Cov hom tseem ceeb ntawm lithium-ion roj teeb

Raws li cov khoom siv hluav taws xob sib txawv siv hauv cov roj teeb lithium-ion, cov roj teeb lithium-ion tau muab faib ua kua lithium-ion roj teeb (LIB), roj teeb lithium-ion condensed, thiab polymer lithium-ion roj teeb (PLB).
Cov roj teeb lithium-ion ua kua
Rechargeable lithium-ion roj teeb yog cov roj teeb uas siv ntau tshaj plaws hauv cov khoom siv digital niaj hnub xws li xov tooj ntawm tes thiab laptops. Yog li ntawd, muaj cov khoom tiv thaiv lossis cov khoom siv hluav taws xob hauv lub roj teeb kom tiv thaiv cov roj teeb kim. Cov kev cai them nqi rau cov roj teeb lithium-ion yog siab heev, thiab kom ntseeg tau tias qhov kev txiav tawm qhov tseeb yog nyob rau hauv ± 1 feem pua, cov tuam txhab loj semiconductor tau tsim ntau yam lithium-ion roj teeb them ICs kom muaj kev nyab xeeb, txhim khu kev qha, thiab them ceev ceev.
Cov xov tooj tseem ceeb hauv xov tooj tau nruab nrog cov roj teeb lithium-ion. Kev siv cov roj teeb lithium-ion kom raug yog qhov tseem ceeb rau kev siv roj teeb ntev. Nws tuaj yeem ua rau hauv cov duab plaub, cylindrical, duab plaub, thiab khawm zoo li tus raws li qhov yuav tsum tau muaj ntawm cov khoom siv hluav taws xob sib txawv, thiab muaj cov roj teeb pob uas muaj ntau lub roj teeb uas txuas nrog hauv series thiab sib npaug. Qhov ntsuas hluav taws xob ntawm lithium-ion roj teeb feem ntau yog 3.7V vim yog cov khoom hloov pauv, thiab 3.2V rau lithium hlau phosphate zoo electrodes. Qhov kev txiav tawm them hluav taws xob thaum them tag nrho yog feem ntau 4.2V thiab 3.65V rau lithium hlau phosphate. Qhov kev txiav tawm qhov hluav taws xob ntawm lithium-ion roj teeb yog 2.75V ~ 3.0V (lub Hoobkas roj teeb muab kev ua haujlwm voltage lossis txiav tawm hluav taws xob, nrog rau qhov sib txawv me ntsis, feem ntau 3.0V, thiab 2.5V rau ferrophosphate). Txuas ntxiv tso tawm hauv qab 2.5V (2.0V lithium hlau phosphate) hu ua overdischarge, uas tuaj yeem ua rau lub roj teeb puas.
Cov roj teeb lithium ion nrog lithium cobalt oxide raws li cov khoom siv hluav taws xob zoo tsis haum rau cov paug tawm tam sim no. Kev tso tawm tam sim no ntau dhau tuaj yeem txo lub sijhawm tso tawm (ua rau kub sab hauv thiab lub zog poob) thiab tuaj yeem ua rau muaj kev phom sij; Tab sis lithium hlau phosphate cathode cov khoom siv lithium roj teeb tuaj yeem them thiab tawm ntawm qhov siab tam sim no ntawm 20C lossis ntau dua (C yog lub roj teeb muaj peev xwm, xws li C=800}mAh, 1C them tus nqi yog them tam sim no ntawm 800mA), uas yog tshwj xeeb tshaj yog haum rau lub tsheb fais. Yog li ntawd, qhov siab tshaj tawm tam sim no muab los ntawm lub Hoobkas tsim cov roj teeb yuav tsum tsawg dua qhov siab tshaj tawm tam sim no thaum siv. Cov roj teeb lithium ion muaj qee qhov yuav tsum tau ua kom sov, thiab lub Hoobkas muab kev them nyiaj kub ntau, tawm qhov kub thiab txias ntau yam. Overvoltage charging tuaj yeem ua rau muaj kev puas tsuaj mus tas li rau cov roj teeb lithium ion. Kev them nyiaj tam sim no ntawm cov roj teeb lithium-ion yuav tsum ua raws li cov lus pom zoo ntawm cov chaw tsim khoom roj teeb thiab yuav tsum muaj kev txwv tam sim no kom tsis txhob overcurrent (overheating). Tus nqi them feem ntau yog 0.25C-1C. Thaum them nrog cov tam sim no siab, feem ntau yuav tsum tau kuaj xyuas qhov kub ntawm lub roj teeb kom tsis txhob overheating, kev puas tsuaj rau lub roj teeb, lossis tawg.
Kev them nyiaj ntawm lithium-ion roj teeb tau muab faib ua ob theem: kev them nyiaj tam sim no ua ntej, thiab hloov mus rau qhov kev them nyiaj tas li thaum mus txog qhov kev txiav tawm voltage. Piv txwv li, lub roj teeb uas muaj peev xwm ntawm 800mAh muaj qhov txiav tawm them hluav taws xob ntawm 4.2V. Lub roj teeb tau them ntawm qhov tam sim no ntawm 800mA (them nqi ntawm 1C). Thaum pib, lub roj teeb voltage nce nrog txoj kab nqes loj. Thaum lub roj teeb voltage nce mus txog 4.2V, nws hloov mus rau 4.2V qhov hluav taws xob tas li, thiab tam sim no maj mam txo qis nrog qhov hloov pauv me ntsis.